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[Mario Sánchez Prada <934291@xxxxxxxxxxxxxxxxxx>]

I've been investigating this issue recently and can confirm that, while
this is not an issue in my Fedora machine with the very same version of
cups, cups-pk-helper and gnome-control-center installed, it is still
present in Ubuntu, due to what I believe it might be a bug in the way
CUPS is being packaged by debian (thus Ubuntu would have inherited the
bug). Thus it's probably a bug in Debian as well.

Long story short, while Fedora configures "root" to be part of CUPS
system administration group, Debian/Ubuntu does not do that and instead
defines "lpadmin" as the only member of that group. Now, because gnome-
control-center actually relies in cups-pk-helper to cancel jobs, CUPS
won't allow doing that in ubuntu because neither the owner of the job
(cups-pk-helper runs as root, not as the username originating the cancel
request from g-c-c) nor an user belonging to SystemGroup is requesting
such an operation. As a result, the operation is not cancelled.

You can see a more detailed explanation here:
https://bugzilla.gnome.org/show_bug.cgi?id=669679#c23

I fixed this locally by changing the debian/rules so that I pass
"--with-system-groups='lpadmin root'" to dh_auto_configure, instead of
simply passing 'lpadmin' and that works for me. I think it's worth
reporting this to debian, but it's unclear to me how to do so, so I
thought I would report it here for now, in case someone could lend a
hand with it.

Thoughts?

PS: A temporary fix for users facing this problem, better than setting
JobsPrivateValues to 'none', would be to simply edit /etc/cups/cups-
files.conf and manually add 'root' to SystemGroup

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-control-center in Ubuntu.
https://bugs.launchpad.net/bugs/934291

Title:
  Deleting or stopping print jobs does not work

Status in GNOME Control Center:
  Incomplete
Status in gnome-control-center package in Ubuntu:
  Incomplete

Bug description:
  Deleting or stopping print jobs through the "gnome-control-center -> printers" menu is not possible.
  (Black rectangle for stopping can be pressed, nothing happens.)

  Deleting with cups via webinterface does work. ( http://localhost:631/
  )

  Please let me know which information to provide.

  Cheers

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: gnome-control-center 1:3.2.2-0ubuntu1
  ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17
  Uname: Linux 3.0.0-16-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Fri Feb 17 16:47:32 2012
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
  SourcePackage: gnome-control-center
  UpgradeStatus: Upgraded to oneiric on 2011-12-17 (61 days ago)
  usr_lib_gnome-control-center:
   deja-dup           22.0~bzr1290.37~oneiric1
   gnome-bluetooth    3.2.0-0ubuntu2
   indicator-datetime 0.3.1-0ubuntu1.1

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